Article
Engineering, Geological
Jae-Kwang Ahn, Dong Youp Kwak, Han-Saem Kim
Summary: This study predicts the VS30 values of 89 seismic stations in South Korea using a semi-empirical relationship between the natural frequency (fp) obtained from HVSR and the shear wave velocity down to 30 meters depth (VS30). The clarity and amplitude of the HVSR affect the strength of the fp-VS30 relationship, with the model developed for stable continent regions being the most suitable.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Xiaoyang Wu, Zhen Guo, Lanbo Liu, Yongshun John Chen, Changqiao Zou, Xiuqing Song
Summary: This study presents the first comprehensive seismological investigation of the Shanghai Tower, utilizing seismic interferometry to analyze ambient noise data. The research successfully identifies resonant modes of the building and observes diurnal variations in seismic velocities and mechanical responses correlated with temperature. The findings demonstrate the effectiveness of seismic ambient-noise interferometry for structural health monitoring and hazard assessment of super high-rise buildings globally.
SEISMOLOGICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Yuki Kawano, Takehi Isse, Akiko Takeo, Hitoshi Kawakatsu, Manabu Morishige, Hajime Shiobara, Nozomu Takeuchi, Hiroko Sugioka, YoungHee Kim, Hisashi Utada, Sang-Mook Lee
Summary: By analyzing seismic records collected at the oldest Pacific seafloor, we revealed the structural characteristics and evolution of the Pacific plate. Our findings suggest the occurrence of reheating process beneath the oldest lithosphere and the existence of different azimuthal anisotropy in different regions of the Pacific plate. These results provide insights into the complex evolution dynamics of the Pacific plate.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Environmental Studies
Eric K. Tokuda, Henrique F. de Arruda, Guilherme S. Domingues, Luciano da F. Costa, Florence As Shibata, Roberto M. Cesar-Jr, Cesar H. Comin
Summary: The study investigates the interaction between cities and their green regions, and simulates the diffusion of green effects to better understand their influences on urban areas, particularly in terms of temperature, humidity, and gas exchanges. The approach involves automatically identifying the green regions, eliminating artifacts, and applying convolutions to analyze the diffusion dynamics. The study finds that even smaller green regions can significantly contribute to the diffusion of green effects in urban areas.
ENVIRONMENT AND PLANNING B-URBAN ANALYTICS AND CITY SCIENCE
(2023)
Article
Engineering, Civil
Jia Lou, Xiang Fang, Hui Fan, Jianke Du
Summary: Seismic metamaterials with nonlinearity have been proposed to protect engineering structures from earthquakes. This study investigates the propagation and dispersion of Rayleigh wave in a nonlinear seismic metamaterial composed of resonators attached on layered soils. Analytical modeling and finite element simulations are employed to analyze the effects of clayey slit and resonator-substrate interaction on the wave propagation. The study shows that the clayey slit reduces the phase velocity of Rayleigh wave, and the interaction with resonators leads to the disappearance of surface wave in a certain frequency band.
ENGINEERING STRUCTURES
(2022)
Review
Geochemistry & Geophysics
Yudi Pan, Lingli Gao
Summary: Shallow-seismic full-waveform inversion (FWI) is an effective method for accurate reconstruction of near-surface models. However, it suffers from ill-posedness and high computational cost. The recently proposed random-objective waveform inversion (ROWI) method shows better efficiency and robustness than FWI.
SURVEYS IN GEOPHYSICS
(2023)
Article
Geochemistry & Geophysics
Changjiang Zhou, Jianghai Xia, Jingyin Pang, Feng Cheng, Xinhua Chen, Chaoqiang Xi, Hongyu Zhang, Ya Liu, Ling Ning, Tianyu Dai, Binbin Mi, Changwei Zhou
Summary: The exploration of geothermal resources in southeast China has driven urbanization and economic transformation. By deploying a dense seismic network and utilizing seismic interferometry and dispersion measurements, high-resolution imaging of local-scale geothermal reservoirs can be achieved. The obtained phase velocity maps, along with shear wave velocity profiles, provide valuable insights into the geological structures and shallow geothermy of the area.
SURVEYS IN GEOPHYSICS
(2021)
Article
Acoustics
Christopher Hakoda, Cristian Pantea, Vamshi Krishna Chillara
Summary: The paper presents a simple method for designing localized regions with minimal SAW amplitude, achieved by controlling the beat phenomenon. These regions can have variable widths and be positioned consecutively. The efficacy of the proposed method for SAW wave propagation is demonstrated through supplementary simulations.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Geochemistry & Geophysics
Cicero Costa da Silva, Esteban Poveda, Renato Ramos da Silva Dantas, Jordi Julia
Summary: Seismic ambient noise analysis has been shown to be an effective alternative to seismic wave analysis, providing information on Green's functions and enabling high-resolution tomographic studies in regions of low seismic activity.
PURE AND APPLIED GEOPHYSICS
(2021)
Article
Astronomy & Astrophysics
Martin Schimmel, Eleonore Stutzmann, Philippe Lognonne, Nicolas Compaire, Paul Davis, Melanie Drilleau, Raphael Garcia, Doyeon Kim, Brigitte Knapmeyer-Endrun, Vedran Lekic, Ludovic Margerin, Mark Panning, Nicholas Schmerr, John Robert Scholz, Aymeric Spiga, Benoit Tauzin, Bruce Banerdt
Summary: This study employs state-of-the-art approaches to investigate the Martian crustal structure, determining a robust reflection response through autocorrelation studies while avoiding bias from unfavorable environmental conditions. The research reveals a likely strong reflection signal from the base of the Martian crust, along with the identification of a P-wave reflection from the mid-crust.
EARTH AND SPACE SCIENCE
(2021)
Article
Geochemistry & Geophysics
Timothy Clements, Marine A. Denolle
Summary: SeisNoise.jl is a high-performance ambient seismic noise cross-correlation library written in Julia, providing researchers with common tools and data structures to design custom workflows. It is compatible with high-performance computing resources and utilizes both CPU and GPU for efficient processing.
SEISMOLOGICAL RESEARCH LETTERS
(2021)
Article
Engineering, Environmental
Elin Asta Olafsdottir, Sigurdur Erlingsson, Bjarni Bessason
Summary: The geological setting of Iceland is unique, with jointed rock mass, glacial outburst floods and eruptions creating loose sediments, and lava rock layers embedded in or overlying soft sediments. This study aims to evaluate the feasibility of using dispersion and ellipticity curves to characterize soil sites in the South Iceland Seismic Zone. The results demonstrate that microtremor HVSR is effective in distinguishing sedimentary sites with and without an embedded lava rock layer.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Education, Scientific Disciplines
Danila Prikazchikov, Roza Sabirova, Peter T. Wootton
Summary: This article studies a seismic meta-surface in the case of an oscillatory system arranged on the surface of an orthorhombic elastic half-space. The approach utilizes the asymptotic hyperbolic-elliptic formulation to analyze the Rayleigh wave excited by prescribed surface loading. By considering the meta-surface as a periodic spring-mass system attached to the surface and averaging the effect of a regular array of oscillators, a hyperbolic equation and dispersion relation are derived.
Article
Engineering, Geological
Hazem Badreldin, Ahmed Abu El-Ata, Mahmoud El-Hadidy, Cecile Cornou, Abd el-aziz Khairy Abd el-aal, Amir Mahr Lala
Summary: This article examines the effect of geological characteristics on the propagation of seismic waves in Nuweiba. By using microtremor and surface wave data sets, the horizontal-to-vertical spectral ratio technique and Multichannel Analysis of Surface Waves are applied to determine parameters such as resonance frequency, bedrock depth, shear wave velocity structure, and transfer function. The study reveals that the geological features in Nuweiba play a significant role in amplifying seismic waves.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Geochemistry & Geophysics
Santiago Rabade, Sin-Mei Wu, Fan -Chi Lin, Derrick J. A. Chambers
Summary: The ability to monitor seismic activity and structural integrity of mines using seismic noise is important for detecting and managing ground-control hazards. In this study, the nature of time-dependent noise cross-correlations functions (CCFs) is investigated in an active underground longwall coal mine. The study demonstrates an effective way to identify and track mining-induced signals and further investigate the temporal structural integrity.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)
Article
Geochemistry & Geophysics
Lee M. Liberty, Zachery M. Lifton, T. Dylan Mikesell
Summary: This article discusses the tectonic framework, seismicity, and aftershock monitoring efforts related to the 6.5 magnitude earthquake in Stanley, Idaho on March 31, 2020. It highlights the possible kinematic link between different fault systems in the region and the historical seismicity patterns in Idaho. The ongoing seismic monitoring efforts are expected to lead to a better understanding of the ground shaking potential and active fault characteristics in the area.
SEISMOLOGICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Zongbo Xu, Ludovic Margerin, T. Dylan Mikesell
Summary: Seismic coda waves are commonly used for estimating subsurface Q values and monitoring subsurface changes. A Monte Carlo algorithm is proposed to model the multiple scattering process and better understand the interaction between body and surface waves, which leads to accurate energy evolution in space and time.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Michael G. Frothingham, Kevin H. Mahan, Vera Schulte-Pelkum, Jonathan Saul Caine, Frederick W. Vollmer
Summary: The deep continental crustal structures have always been a mystery due to lack of direct exposures and limited tools for remote investigation. By analyzing structural data from geologic maps and combining them with bulk rock elastic tensors, this study investigates the crustal seismic anisotropy in Colorado, and reveals the close correlation between crystalline fabrics, predicted seismic properties, tectonic structures and the observed crustal seismic signals.
Article
Geochemistry & Geophysics
Ping Zhang, Meghan S. Miller, Vera Schulte-Pelkum
Summary: This study analyzes the convergent plate boundary in eastern Indonesia and Timor-Leste, identifying oriented tectonic fabrics and seismic phenomena related to magmatic structures. These fabrics may be associated with orogenic processes and plate collision, influencing crustal deformation and strain partitioning.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Geosciences, Multidisciplinary
E. Astafyeva, B. Maletckii, T. D. Mikesell, E. Munaibari, M. Ravanelli, P. Coisson, F. Manta, L. Rolland
Summary: In this study, data from ground-based receivers of the Global Navigation Satellite System are analyzed to explore the ionospheric response to the eruption of the Hunga Tonga-Hunga Ha'apai submarine volcano. The ionospheric response is shown to consist of a significant increase in total electron content (TEC) followed by a strong and long-lasting depletion. The energy released during the main explosion is estimated based on the ionospheric TEC data.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Multidisciplinary Sciences
Robin S. Matoza, David Fee, Jelle D. Assink, Alexandra M. Iezzi, David N. Green, Keehoon Kim, Liam Toney, Thomas Lecocq, Siddharth Krishnamoorthy, Jean-Marie Lalande, Kiwamu Nishida, Kent L. Gee, Matthew M. Haney, Hugo D. Ortiz, Quentin Brissaud, Leo Martire, Lucie Rolland, Panagiotis Vergados, Alexandra Nippress, Junghyun Park, Shahar Shani-Kadmiel, Alex Witsil, Stephen Arrowsmith, Corentin Caudron, Shingo Watada, Anna B. Perttu, Benoit Taisne, Pierrick Mialle, Alexis Le Pichon, Julien Vergoz, Patrick Hupe, Philip S. Blom, Roger Waxler, Silvio De Angelis, Jonathan B. Snively, Adam T. Ringler, Robert E. Anthony, Arthur D. Jolly, Geoff Kilgour, Gil Averbuch, Maurizio Ripepe, Mie Ichihara, Alejandra Arciniega-Ceballos, Elvira Astafyeva, Lars Ceranna, Sandrine Cevuard, Il-Young Che, Rodrigo De Negri, Carl W. Ebeling, Laslo G. Evers, Luis E. Franco-Marin, Thomas B. Gabrielson, Katrin Hafner, R. Giles Harrison, Attila Komjathy, Giorgio Lacanna, John Lyons, Kenneth A. Macpherson, Emanuele Marchetti, Kathleen F. McKee, Robert J. Mellors, Gerardo Mendo-Perez, T. Dylan Mikesell, Edhah Munaibari, Mayra Oyola-Merced, Iseul Park, Christoph Pilger, Cristina Ramos, Mario C. Ruiz, Roberto Sabatini, Hans F. Schwaiger, Dorianne Tailpied, Carrick Talmadge, Jerome Vidot, Jeremy Webster, David C. Wilson
Summary: The eruption of the Hunga volcano in Tonga on 15 January 2022 caused an explosion in the atmosphere, generating a range of atmospheric waves that were observed globally. The eruption produced significant infrasound, audible sound, and ionospheric perturbations, and contributed to the occurrence of tsunamis. The exceptional observations of the atmospheric waves are highlighted in this study.
Article
Geochemistry & Geophysics
Thomas Dylan Mikesell, Aurelien Mordret, Zongbo Xu, William B. Frank
Summary: This study used seismic data from the Polar Earth Observing Network to compute the correlation tensor between Antarctic stations, extracting Rayleigh and Love wave velocity information. Using tomography and inversion algorithms, a 2D isotropic shear-wave velocity model was built, revealing a low-velocity zone beneath Marie Byrd Land and a velocity contrast in the lower crust. The findings have important implications for earthquake research and hypocenter estimation in the region.
SEISMOLOGICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Zongbo Xu, T. Dylan Mikesell
Summary: Estimating the distribution and characteristics of seismic sources from ambient seismic waves is an important problem. The commonly used methods, matched field processing and full waveform inversion, have differences in model resolution and uncertainty, which need to be further studied and compared.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
Shucheng Wu, Chengxin Jiang, Vera Schulte-Pelkum, Ping Tong
Summary: In this study, we present a high-resolution P-wave azimuthally anisotropic velocity model for the upper and middle crust beneath southern California using a novel adjoint-state traveltime tomography technique. Our model reveals significant anisotropy variations between tectonic blocks, reflecting both past and current plate boundary deformation. The study also identifies seismic anisotropy patterns in the shallow crust and deeper depths, as well as layered structures beneath the Salton Trough.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Jonathan Simpson, Kasper van Wijk, Ludmila Adam, Lionel Esteban
Summary: Research shows that rocks exhibit a decrease in elastic modulus during acoustic perturbation, followed by a logarithmic recovery to the original value. This paper investigates nonlinear elasticity in rocks through temperature perturbations and laboratory experiments. The study finds that temperature changes induce changes in ultrasonic velocity, and a modified model explains the observations based on the shearing and recreation of internal microscopic contacts.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Mayara F. Cizina, T. Dylan Mikesell, Matthew J. Kohn
Summary: Raman spectroscopy is commonly used to identify mineral and fluid inclusions in host crystals and calculate pressure-temperature conditions for thermobarometric applications. This study aims to determine the reproducibility of Raman peak position measurements for quartz and zircon inclusions, as well as to identify optimal measurement conditions. The results provide important insights for interlaboratory comparisons and improve the accuracy of elastic thermobarometry.
AMERICAN MINERALOGIST
(2023)
Article
Geosciences, Multidisciplinary
Michael G. Frothingham, Kevin H. Mahan, Vera Schulte-Pelkum, Philippe Goncalves, Michele Zucali
Summary: Seismic anisotropy is primarily controlled by aligned rock-forming minerals, and previous studies have focused on solid-state shear as the main cause, neglecting the magmatic fabric in plutonic rocks. In this study, we investigate the contributions of magmatic fabric to seismic anisotropy through the analysis of samples from different tectonic settings. Results show that magmatic fabric can lead to significant anisotropy comparable to solid-state deformation, and magmatically aligned feldspar can cause a unique foliation-perpendicular fast velocity. This highlights the importance of considering magmatic fabric in understanding crustal seismic anisotropy.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
M. Ravanelli, E. Astafyeva, E. Munaibari, L. Rolland, T. D. Mikesell
Summary: We investigate the oceanic and ionospheric response to the Hunga-Tonga volcanic eruption in New Caledonia-New Zealand and Chile-Argentina. We observe a reversed response in terms of the amplitudes, with the ionospheric perturbation being considerable while the sea-surface fluctuations were not remarkable. The eruption-induced tsunami caused major variations in sea-surface heights, while the associated ionospheric perturbation was quite small. We estimate a delay of approximately 12-20 minutes between the Lamb waves and their signatures in the ionosphere.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Astronomy & Astrophysics
Shin-Chan Han, Simon McClusky, T. Dylan Mikesell, Lucie Rolland, Emile Okal, Craig Benson
Summary: Multiple passages of atmospheric waves were observed after the HTHH volcanic eruption, perturbing the ionosphere and producing TIDs. New observations of TIDs at high altitudes (>550 km) were made using CubeSat GPS tracking data, which provided complementary information to ground receivers due to their larger spatial coverage over a shorter period of time. The TIDs traveled globally and reached high altitudes, indicating a speed of approximately 350 m/s.
EARTH AND SPACE SCIENCE
(2023)
Proceedings Paper
Computer Science, Hardware & Architecture
Ravi Shankar, Aaron Orenstein, Anna Rift, Tobi Popoola, MacDonald Lowe, Shuai Yang, T. Dylan Mikesell, Catherine Olschanowsky
Summary: Scientific applications contain valuable scientific knowledge, but they need to be adapted and extended as hardware evolves. Visual representation of dataflow can help solve performance problems and dead code. This paper presents a case study using the Computation API of the sparse polyhedral framework to optimize scientific applications.
LANGUAGES AND COMPILERS FOR PARALLEL COMPUTING (LCPC 2021)
(2022)
